diff --git a/variants/STM32F0xx/F031K6T/variant_NUCLEO_F031K6.cpp b/variants/STM32F0xx/F031K6T/variant_NUCLEO_F031K6.cpp
index 7d6b8ddd1a..a771610b82 100644
--- a/variants/STM32F0xx/F031K6T/variant_NUCLEO_F031K6.cpp
+++ b/variants/STM32F0xx/F031K6T/variant_NUCLEO_F031K6.cpp
@@ -70,20 +70,23 @@ WEAK void SystemClock_Config(void)
   RCC_OscInitTypeDef RCC_OscInitStruct = {};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
 
-  /*
-   * Initializes the RCC Oscillators according to the specified parameters
-   * in the RCC_OscInitTypeDef structure.
-   */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
-  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
+  /** Initializes the RCC Oscillators according to the specified parameters
+  * in the RCC_OscInitTypeDef structure.
+  * No HSE Oscillator on Nucleo by default (solderbridge not configured)
+  */
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
-  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;
   RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
     Error_Handler();
   }
-  /* Initializes the CPU, AHB and APB buses clocks */
+
+  /** Initializes the CPU, AHB and APB buses clocks
+  */
   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                 | RCC_CLOCKTYPE_PCLK1;
   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;